Abstract
The effect of the acyclic nucleotide analogue, 9-(2-phosphonomethoxyethyl)adenine (PMEA, Adefovir), and its (bis)pivaloyloxymethyl ester (bis-POM-PMEA, Adefovir Dipivoxil) on in vitro nitric oxide (NO) production by murine peritoneal macrophages was investigated. Bis-POM-PMEA inhibited in a concentrationdependent manner the formation of NO generated by interferon-γ and lipopolysaccharide, the 1C 50 being 15 μM. Suppressed transcription of mRNA for inducible NO synthase (EC 1.14.13.39) resulting in decreased synthesis of NO synthase protein was found. Parent compound PMEA was virtually ineffective.
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